Support access json key without quotation marks (#24062)

Signed-off-by: Ncai.zhang <cai.zhang@zilliz.com>

internal/parser/planparserv2/Plan.g4

@@ -85,7 +85,7 @@ FloatingConstant:
 Identifier: Nondigit (Nondigit | Digit)*;
 
 StringLiteral: EncodingPrefix? '"' SCharSequence? '"';
-JSONIdentifier: Identifier('[' (StringLiteral | IntegerConstant) ']')+;
+JSONIdentifier: Identifier('[' ('"' SCharSequence '"' | '\'' SCharSequence '\'' | SCharSequence | IntegerConstant) ']')+;
 
 fragment EncodingPrefix: 'u8' | 'u' | 'U' | 'L';
 

internal/parser/planparserv2/plan_parser_v2_test.go

@@ -830,6 +830,33 @@ func Test_JSONExpr(t *testing.T) {
 		RoundDecimal: 0,
 	})
 	assert.NoError(t, err)
+
+	expr = `A[B][0] > 100`
+	_, err = CreateSearchPlan(schema, expr, "FloatVectorField", &planpb.QueryInfo{
+		Topk:         0,
+		MetricType:   "",
+		SearchParams: "",
+		RoundDecimal: 0,
+	})
+	assert.NoError(t, err)
+
+	expr = `A['B'][0] > 100`
+	_, err = CreateSearchPlan(schema, expr, "FloatVectorField", &planpb.QueryInfo{
+		Topk:         0,
+		MetricType:   "",
+		SearchParams: "",
+		RoundDecimal: 0,
+	})
+	assert.NoError(t, err)
+
+	expr = `JSONField[0] > 100`
+	_, err = CreateSearchPlan(schema, expr, "FloatVectorField", &planpb.QueryInfo{
+		Topk:         0,
+		MetricType:   "",
+		SearchParams: "",
+		RoundDecimal: 0,
+	})
+	assert.NoError(t, err)
 }
 
 func Test_InvalidExprOnJSONField(t *testing.T) {